题目网址: http://www.puzzleup.com/2017/ http://www.puzzleup.com/2017/puzzle/?14 答题时限: 11月９日７ＰＭ－比赛结束（约12月27日） 加分时限: 11月９日７ＰＭ－11月14日６：５９ＰＭ 答对可得基本分１００分。答案可上传５次，每改１次答案从基本分扣２０分。　 比赛期间内可随时上传答案，加分时限内答对第ｎ天加（６－ｎ）分　 　　 　　 另依题目的难易有额外加分（如有８０％的人这题答错，答对者加８０分）　　 ◆DICE GAME You will play a game of chance with your friend by throwing a dice repeatedly. * Whenever 4 even numbers appear in a row, you will win. * Whenever 4 odd numbers appear in a row, your friend will win. * Whenever 5 even numbers appear (may not be in a row), your friend will win. * If first and third condition occur at the same time, first condititon has the priority. What is your probability of winning the game? (Enter your answer as a reduced fraction. Example: 123/4567) 你和你的朋友玩一个游戏, 重覆投掷一个骰子。 * 如果连续出现四个偶数, 你赢。 * 如果连续出现四个奇数, 你的朋友赢。 * 如果出现过五个偶数 (不一定连续), 你的朋友赢。 * 若第一和第三个条件同时满足, 第一个条件优先。 试问你赢的机率为何? (以最简分数回答，如 123/4567。) -- 'You've sort of made up for it tonight,' said Harry. 'Getting the sword. Finishing the Horcrux. Saving my life.' 'That makes me sound a lot cooler then I was,' Ron mumbled. 'Stuff like that always sounds cooler then it really was,' said Harry. 'I've been trying to tell you that for years.' -- Harry Potter and the Deathly Hollows, P.308 --

※ 发信站: 批踢踢实业坊(ptt.cc), 来自: 123.195.9.46 ※ 文章网址: https://webptt.com/cn.aspx?n=bbs/puzzle/M.1510271096.A.45B.html